Molding-machine



No maal.) Y 2 sh@eww-sheenY 1. WLB. STERRIT.

M'OLDING:k MACHINE.

No. 49"'L273, Patented Feb. 7, 1893.

(No Mode.) 2 Sheets-Sheet 2.

W. B. STERRIT.

MOLDING MACHINE.

No. 491,273. Patented Feb. 7, 1893.

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the counter-weight raises the cylinder and rammer, when the brake isagain set and the operation continued. It is evident that thecounterweight may be so arranged as to gradually raise the cylinder asthe sand rises in the mold.

In Fig. 6 I show a modification of the top plate for the mold for usewhen the side of the mold has an outward bend to make sufficientthickness of sand for the sprue 40. In this case the flange 8 is of thesame form as the top of the flask, but a slot 4l is provided so thatafter the wheel has run around the rim of the plate and rammed the sandbetween the sprue and mold, it can be run through the slot off theplate, the carriage then resting upon its three casters, the rammerbeing guided between the sprue and the pattern. The ball and socketjoint allows the rammer to move freely to the various parts of the mold,and the wheel 1G preserves the rammer in the annular space between theflask and pattern.

It is apparent that wide variations may be made in the form andarrangement of the parts. Thus the pinion may be placed upon thecylinder and the rack be stationary. A single cord may be used tosupport the weight. A pawl and ratchet may be used to hold the cylinderin its various positions; and many other modifications will suggestthemselves to those skilled in the art without departure from theinvention claimed.

The advantages of my invention are obvious. The device is simple,positive in all its movements and not liable to get out ot order, whileits operation is ellicient in the highest degree, all hand work beingobviated.

Vhat I claim is:-

I. In a molding machine for deep molds, averticallymovablecylinder,arammerhavinga flexible connection with thepiston rod of said cylinder, and guides on which the cylinder isarranged to rise automaticallyasthe sand rises in the mold;substantially as and for the purposes described.

2. In a molding-machine, the combination of a vertically movablemotive-cylinder having suitable guides, acounterweight connected to thecylinder, and a rammer having a flexible connection with the piston-rodof said cylinder; substantially as described.

3. In a molding-machine, the combination of a vertically movablemotive-cylinder having a rack and pinion connection, a brakearranged tocheck the vertical movement of the cylinder, and a rammer connected tothe piston-rod of said cylinder; substantially as described.

4. In a molding-machine, the combination of a vertically movablemotive-cylinder, means for allowing the same to rise asthe sand rises inthe mold an apertured guide fixed to and carried beneath the cylinder,and a rammer havin g a flexible connection with the pistonrod of thecylinder, which rod passes through the guide; substantially asdescribed.

5. In a molding-machine, the combination of a motive-cylinder, means formoving the same vertically, a rack fixed to the side of the cylinder andengaging a pinion, a brake upon the pinion-shaft, and a rammer connectedto the piston-rod of the motive-cylinder; substantially as described.

G. In a molding-machine, the combination of a motive-eylinder, means formoving the same vertically, a rammer connected to the piston-rod of saidcylinder by a ball and socket joint, and a guide for the rammer abovethe top of the mold; substantially as described.

'7. In a molding-machine, the combination of a rammer, means forvertically reciprocating the same, and an independently supported guidethrough which the rammer passes, said guide arranged to be moved overthe various parts ot' the mold; substantially as described.

8. In a molding-machine, the combination with the mold, of a rotarycarriage mounted thereover, a rammer flexibly connected to an actuatingpart, a guiding aperture in the carriage through which the rammerpasses, and means for reciprocating said rammer; substantially asdescribed.

9. In a molding-machine, the combination with the mold, of a rotarycarriage mounted thereover, a pattern having a stem passing through aslot in the carriage, a guiding aperture in the carriage through whichthe rammer passes, and means for reciprocating the rammer; substantiallyas described.

I0. In a molding machine, the combination with the mold, of a platehaving an aperture and an encircling flange of substantially the sameshape as the mold, and a carriage having a wheel arranged to ride uponthe ange, and having a guiding aperture for the rammer; substantially asdescribed.

In testimony whereof I have hereunto set my hand this Ilth day of March,A. D. 1802.

TILLIAM B. STERRIT.

Vitnesses:

IV. I3. CoRwIN, ll. M. CoRwIN.

IOO

